Hayward OmniPL firmware update

The system has been trying to update the firmware (from 5.0.2 to 5.0.4) for three days. Message says Downloading the update - do not interrupt. Get to 99% and freezes. I power it off, turn off power at breaker and restart. Looks like it is ok. The next morning the whole process starts again.

Tried to use a flash drive to download the firmware update from the Hayward website and use it to complete the update. Nope. Same issue.

Found nothing online (other than others with same issue going back years with older firmware updates).

Anyone else having this problem? Got a solution?